Adopted by 5sos

Mark Goldstein is far from being an average 16-year-old. 5 Seconds Of Summer are the farthest from being 4 normal teenagers. To make them even less normal, they adopt another teenager, Mark Goldstein. ¯\_(ツ)_/¯ The first few chapters aren't very good so if you're planning on not reading it after the first few ch...